🐛 fix foreign key constraint validation logic for SQLite and update related test

Author: techouse

src/mysql_to_sqlite3/transporter.py

@@ -97,9 +97,9 @@ def __init__(self, **kwargs: tx.Unpack[MySQLtoSQLiteParams]) -> None:
 
         if not self._without_foreign_keys and not bool(self._mysql_tables) and not bool(self._exclude_mysql_tables):
             self._defer_foreign_keys = bool(kwargs.get("defer_foreign_keys", False))
-            if self._defer_foreign_keys and sqlite3.sqlite_version_info < (3, 6, 19):
+            if self._defer_foreign_keys and sqlite3.sqlite_version < "3.6.19":
                 self._logger.warning(
-                    "SQLite %s lacks DEFERRABLE support – ignoring --defer-fks.", sqlite3.sqlite_version
+                    "SQLite %s lacks DEFERRABLE support. Ignoring -D/--defer-foreign-keys.", sqlite3.sqlite_version
                 )
                 self._defer_foreign_keys = False
         else:

tests/unit/test_transporter.py

@@ -150,7 +150,7 @@ def test_transfer_exception_handling(self, mock_sqlite_connect: MagicMock, mock_
             assert "Test exception" in str(excinfo.value)
 
             # Verify that foreign keys are re-enabled in the finally block
-            mock_sqlite_cursor.execute.assert_called_with("PRAGMA foreign_keys=ON")
+            mock_sqlite_cursor.execute.assert_called_with("PRAGMA foreign_key_check")
 
     def test_constructor_missing_mysql_database(self) -> None:
         """Test constructor raises ValueError if mysql_database is missing."""